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Anion Exchange Properties of Layered Double Hydroxides
Research Guide

What is Anion Exchange Properties of Layered Double Hydroxides?

Anion exchange properties of layered double hydroxides (LDHs) refer to the selective intercalation, kinetics, and memory effects enabling replacement of interlayer anions like Cl-, NO3-, CO3^2-, and organics in Mg-Al or Zn-Al structures.

LDHs exhibit tunable anion exchange due to their brucite-like layers with positive charge balanced by exchangeable anions. Studies focus on chloride, nitrate, sulfate, and carbonate uptake in simulated environments (Ke et al., 2017; 337 citations). Over 200 papers explore selectivity and release kinetics, with Zn-Al LDHs showing high dye removal via anion exchange (Mahjoubi et al., 2015; 248 citations).

Curated Papers

Key Challenges

Why It Matters

LDH anion exchangers remove contaminants like nitrate and phosphate from water, outperforming zeolites in selectivity (Halajnia et al., 2013). In concrete pore solutions, Mg-Al LDHs bind chloride and carbonate to prevent corrosion (Ke et al., 2017). Drug intercalation enables controlled release, with reviews detailing pH-triggered anion exchange (Rives et al., 2014; 389 citations). Applications extend to dye remediation using Zn-Al LDH variants (Mahjoubi et al., 2015).

Key Research Challenges

Intercalation Kinetics Variability

Anion exchange rates depend on LDH composition and pH, complicating predictive models (Ke et al., 2017). Mg-Al LDHs show slower chloride uptake in alkaline solutions compared to nitrate. Memory effects hinder reversibility after carbonate exposure (Palmer et al., 2008).

Anion Selectivity Control

Achieving preference for target anions like NO3- over CO3^2- remains difficult in mixed solutions (Halajnia et al., 2013). Zn-Al LDHs favor sulfate but lose efficiency with organics (Mahjoubi et al., 2015). Surface modifications are needed for enhanced selectivity.

Stability Post-Exchange

LDH layers dissolve under acidic conditions after organic anion intercalation (Rives et al., 2014). Repeated cycling reduces capacity due to phase changes. Calcination-reconstruction improves durability but alters kinetics.

Essential Papers

Recent Progress on Layered Double Hydroxides and Their Derivatives for Electrocatalytic Water Splitting

Yanyong Wang, Dafeng Yan, Samir El Hankari et al. · 2018 · Advanced Science · 721 citations

Abstract Layered double hydroxide (LDH)‐based materials have attracted widespread attention in various applications due to their unique layered structure with high specific surface area and unique ...

Intercalation of drugs in layered double hydroxides and their controlled release: A review

V. Rives, M. del Arco, C. Dianne Martin · 2014 · Applied Clay Science · 389 citations

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

L. A. Utracki, Maryam Sepehr, Enrico Boccaleri · 2007 · Polymers for Advanced Technologies · 385 citations

Abstract This review discusses preparation and use of the synthetic layered nanoparticles in polymer matrices, i.e., in the polymeric nanocomposites (PNCs). Several types of synthetic or semi‐synth...

Carbonate intercalated Zn/Fe layered double hydroxide: A novel photocatalyst for the enhanced photo degradation of azo dyes

Kulamani Parida, Lagnamayee Mohapatra · 2011 · Chemical Engineering Journal · 348 citations

Uptake of chloride and carbonate by Mg-Al and Ca-Al layered double hydroxides in simulated pore solutions of alkali-activated slag cement

Xinyuan Ke, Susan A. Bernal, John L. Provis · 2017 · Cement and Concrete Research · 337 citations

Chloride ingress and carbonation are major causes of degradation of reinforced concrete. To enable prediction of chloride ingress, and thus to improve the durability of structural alkali-activated ...

Chemical Modifications of Layered Double Hydroxides in the Supercapacitor

Chuan Jing, Biqin Dong, Yuxin Zhang · 2020 · Energy & environment materials · 266 citations

Layered double hydroxides are one class or kind of 2D layered materials that are considered promising for use in the supercapacitor. Although there have been many studies on the structure, composit...

Two‐Dimensional Metal Oxide and Metal Hydroxide Nanosheets: Synthesis, Controlled Assembly and Applications in Energy Conversion and Storage

Johan E. ten Elshof, Huiyu Yuan, Pablo Gonzalez Rodriguez · 2016 · Advanced Energy Materials · 260 citations

The developments and state of the art in the research on two‐dimensional nanosheets derived from layered metal oxides and layered metal hydroxides are reviewed in this paper, with emphasis on their...

Reading Guide

Foundational Papers

Start with Rives et al. (2014; 389 citations) for drug intercalation basics and controlled release mechanisms, then Halajnia et al. (2013; 216 citations) for nitrate/phosphate adsorption isotherms, followed by Palmer et al. (2008; 230 citations) on hydrotalcite anion coordination.

Recent Advances

Study Ke et al. (2017; 337 citations) for chloride/carbonate uptake in pore solutions, Mahjoubi et al. (2015; 248 citations) for Zn-Al LDH anion variants in dye removal.

Core Methods

Co-precipitation at constant pH forms anion-intercalated LDHs (Mahjoubi et al., 2015); batch equilibrium tests quantify uptake (Halajnia et al., 2013); in-situ XRD and FTIR track exchange dynamics (Ke et al., 2017).

How PapersFlow Helps You Research Anion Exchange Properties of Layered Double Hydroxides

Discover & Search

Research Agent uses searchPapers with query 'anion exchange kinetics layered double hydroxides Cl- NO3-' to retrieve 500+ papers including Ke et al. (2017), then citationGraph maps influx from Mahjoubi et al. (2015; 248 citations) to dye removal applications, and findSimilarPapers expands to Halajnia et al. (2013) for phosphate selectivity.

Analyze & Verify

Analysis Agent applies readPaperContent on Ke et al. (2017) to extract chloride uptake isotherms, verifies kinetics claims via verifyResponse (CoVe) against experimental data, and uses runPythonAnalysis to fit Langmuir models with NumPy/pandas on isotherm datasets, graded by GRADE for evidence strength in pore solution simulations.

Synthesize & Write

Synthesis Agent detects gaps in multi-cycle stability via contradiction flagging across Rives et al. (2014) and Mahjoubi et al. (2015), then Writing Agent uses latexEditText for LDH structure diagrams, latexSyncCitations to link 20 references, and latexCompile for publication-ready review sections with exportMermaid for exchange pathway flowcharts.

Use Cases

"Extract anion exchange rate constants from Ke et al. 2017 and fit kinetic model"

Research Agent → searchPapers → readPaperContent (Ke et al., 2017) → Analysis Agent → runPythonAnalysis (pandas fit pseudo-second-order kinetics) → matplotlib plot of rate vs. concentration output.

"Write LaTeX section on Zn-Al LDH nitrate exchange with citations"

Research Agent → citationGraph (Mahjoubi et al., 2015) → Synthesis Agent → gap detection → Writing Agent → latexEditText (insert selectivity data) → latexSyncCitations (add Halajnia et al., 2013) → latexCompile → PDF section output.

"Find GitHub code for LDH anion exchange simulations"

Research Agent → searchPapers ('LDH anion exchange simulation') → paperExtractUrls → Code Discovery → paperFindGithubRepo → githubRepoInspect → Python script for Monte Carlo intercalation kinetics output.

Automated Workflows

Deep Research workflow scans 50+ papers on LDH anion exchange via searchPapers → citationGraph, producing structured report with selectivity tables from Ke et al. (2017) and Halajnia et al. (2013). DeepScan applies 7-step CoVe analysis to Rives et al. (2014) drug release kinetics, verifying pH-dependence claims. Theorizer generates hypotheses on memory effect mechanisms from Palmer et al. (2008) anion binding data.

Try Doxa for Anion Exchange Properties of Layered Double Hydroxides Research

Frequently Asked Questions

What defines anion exchange in LDHs?

Anion exchange in LDHs involves replacement of interlayer anions through ion-dipole interactions and electrostatic forces in positively charged brucite layers, showing selectivity based on anion size and charge density.

What methods study LDH anion exchange?

Co-precipitation synthesizes anion-specific LDHs (Mahjoubi et al., 2015), with uptake measured by batch isotherms and XRD for intercalation confirmation (Ke et al., 2017). Release kinetics use pH-swing or dialysis.

What are key papers on LDH anion exchange?

Rives et al. (2014; 389 citations) reviews drug intercalation; Ke et al. (2017; 337 citations) details Cl-/CO3^2- uptake in cement; Mahjoubi et al. (2015; 248 citations) covers Zn-Al LDH dye removal.

What open problems exist in LDH anion exchange?

Predicting multi-anion selectivity in real wastewater, enhancing acidic stability post-organic exchange, and scaling memory effect control for industrial remediation remain unresolved.